The Non-perturbative term for the Axial-vector Form Factor of Pion Decay

Abstract

The axial-vector form factor for the decay of pion ${\pi }^{+}\to \gamma +e^{+}+{\nu }_e$ is calculated by using the pseudovector coupling pion-nucleon interaction with the non-perturbative term. The self-energy is approximated by the lowest-order constant. The parameter is significant to improve the value of the form factor as well as the vector form factor in our previous study.

Comments: 9 pages